Mitchell, Orford, Byrne, Ryan of kildare

Re: Mitchell, Orford, Byrne, Ryan of kildare

Still looking for more information about g/g grandfather, Thomas Dunne born Timolin, Dec. 1791 Co. Kildare to Murtagh Dunne and Eleanor/Helena Keogh. Did they own land locally? Who was Thomas' first wife in Ireland? Did she die there? What happened to his siblings, John and Anne? How did Thomas get to Australia around 1840/41? When did his parents die? Where are they buried? Any leads gratefully appreciated.Dale in Australia